{"id":117163,"date":"2024-07-18T12:33:32","date_gmt":"2024-07-18T15:33:32","guid":{"rendered":"https:\/\/www.lawnstarter.com\/blog\/?p=117163"},"modified":"2025-09-03T11:13:25","modified_gmt":"2025-09-03T14:13:25","slug":"when-to-fertilize-kentucky-bluegrass","status":"publish","type":"post","link":"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/when-to-fertilize-kentucky-bluegrass\/","title":{"rendered":"When to Fertilize Kentucky Bluegrass\u00a0"},"content":{"rendered":"<p>The best time to fertilize your Kentucky bluegrass is in <strong>autumn<\/strong> if you want to keep it low-maintenance. However, if you dream of a lawn worthy of a magazine cover, you\u2019ll need to apply fertilizer all year long, except in winter when your grass is taking a nap.<\/p>    <p>Depending on how dense and green you want your turf to be, expect to apply between 1 and 5 pounds of nitrogen per 1,000 square feet each year. This means you need an annual fertilizer program that involves between one and five applications. In this article, you&#8217;ll learn to identify your goals and how and when to fertilize your Kentucky bluegrass lawn.<\/p>   <div class=\"wp-block-ub-table-of-contents-block ub_table-of-contents\" id=\"ub_table-of-contents-09a41599-69d1-4387-a347-ef2ab1f277a3\" data-linktodivider=\"false\" data-showtext=\"show\" data-hidetext=\"hide\" data-scrolltype=\"auto\" data-enablesmoothscroll=\"false\" data-initiallyhideonmobile=\"false\" data-initiallyshow=\"true\"><div class=\"ub_table-of-contents-header-container\" style=\"\"> \t\t\t<div class=\"ub_table-of-contents-header\" style=\"text-align: left; \"> \t\t\t\t<div class=\"ub_table-of-contents-title\">This article covers the following:<\/div> \t\t\t\t \t\t\t<\/div> \t\t<\/div><div class=\"ub_table-of-contents-extra-container\" style=\"\"> \t\t\t<div class=\"ub_table-of-contents-container ub_table-of-contents-1-column\"> \t\t\t\t<ul style=\"\"><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/when-to-fertilize-kentucky-bluegrass\/#0-kentucky-bluegrass-seasonal-fertilization\" style=\"\">Kentucky Bluegrass Seasonal Fertilization<\/a><ul><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/when-to-fertilize-kentucky-bluegrass\/#1-spring-fertilization-for-kentucky-bluegrass-march-may\" style=\"\">Spring Fertilization for Kentucky Bluegrass (March &#8211; May)<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/when-to-fertilize-kentucky-bluegrass\/#5-summer-fertilization-for-kentucky-bluegrass-june-august\" style=\"\">Summer Fertilization for Kentucky Bluegrass (June &#8211; August)<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/when-to-fertilize-kentucky-bluegrass\/#9-autumn-fertilization-for-kentucky-bluegrass-september-november\" style=\"\">Autumn Fertilization for Kentucky Bluegrass (September &#8211; November)<\/a><\/li><\/ul><\/li><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/when-to-fertilize-kentucky-bluegrass\/#13-when-not-to-fertilize-kentucky-bluegrass\" style=\"\">When Not to Fertilize Kentucky Bluegrass<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/when-to-fertilize-kentucky-bluegrass\/#14-faq-about-fertilizing-kentucky-bluegrass\" style=\"\">FAQs About Fertilizing Kentucky Bluegrass<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/when-to-fertilize-kentucky-bluegrass\/#18-find-help-to-maintain-your-lawn\" style=\"\">Find Help to Maintain Your Lawn<\/a><\/li><\/ul> \t\t\t<\/div> \t\t<\/div><\/div>   <h2 class=\"wp-block-heading\" id=\"0-kentucky-bluegrass-seasonal-fertilization\">Kentucky Bluegrass Seasonal Fertilization<\/h2>    <figure class=\"wp-block-image aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"533\" src=\"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2023\/05\/Kentucky-Bluegrass.jpg\" alt=\"Kentucky Bluegrass Blades Close Up\" class=\"wp-image-91813\" srcset=\"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2023\/05\/Kentucky-Bluegrass.jpg 800w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2023\/05\/Kentucky-Bluegrass-300x200.jpg 300w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2023\/05\/Kentucky-Bluegrass-646x430.jpg 646w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2023\/05\/Kentucky-Bluegrass-150x100.jpg 150w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2023\/05\/Kentucky-Bluegrass-768x512.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">Kentucky Bluegrass close-up<br>Photo Credit: <a href=\"https:\/\/www.shutterstock.com\/image-photo\/kentucky-bluegrass-blades-close-1392558278\" target=\"_blank\" rel=\"noreferrer noopener\">Joshua Boman<\/a> \/ Shutterstock<\/figcaption><\/figure>    <p>The right seasonal fertilizer application can turn your Kentucky bluegrass from drab to fab. But first, a tip from the pros: <strong>get a soil test<\/strong>. It will tell you exactly what nutrients your grass needs and what season to apply them in.&nbsp;<\/p>    <p>Then, depending on how lush and green you want your Kentucky bluegrass to be, you have to apply anywhere from <strong>1 to 5 pounds of fertilizer per 1,000 square feet each year<\/strong>.&nbsp;<\/p>    <p>Before you go on a fertilizing frenzy, <strong>set your goals<\/strong>. If you dream of having the greenest, most vibrant lawn on the block, get ready to use the highest amount of fertilizer and apply it more often. It\u2019s a high-maintenance task, but your lawn will look amazing.<\/p>    <p>On the other hand, if you just want your lawn to be healthy without spending too much time and energy, stick to the lowest amount of nitrogen. This low-maintenance approach will keep your grass in good shape with less effort.<\/p>    <p>Take a look at the following chart to help you decide your goals:<\/p>    <figure class=\"wp-block-table is-style-stripes\"><table class=\"has-border-color has-cyan-bluish-gray-border-color\" style=\"border-width:1px\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\" rowspan=\"2\"><br><strong>Maintenance Intensity<\/strong><\/th><th><strong>Total Annual Amount<\/strong><\/th><th><strong>Early Spring<\/strong><\/th><th><strong>Late Spring<\/strong><\/th><th><strong>Summer<\/strong><\/th><th><strong>Early Autumn<\/strong><\/th><th><strong>Late Autumn<\/strong><\/th><\/tr><tr><th class=\"has-text-align-center\" data-align=\"center\" colspan=\"6\"><strong>Pounds of Nitrogen per 1,000 square feet<\/strong><\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Low<\/strong><\/td><td><strong>1 &#8211; 3<\/strong><\/td><td>0 &#8211; 0.5<\/td><td>0 &#8211; 0.5<\/td><td>0<\/td><td>0.5 &#8211; 1<\/td><td>0 &#8211; 1<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Moderate<\/strong><\/td><td><strong>2 &#8211; 4<\/strong><\/td><td>0 &#8211; 0.75<\/td><td>0.5 &#8211; 0.75<\/td><td>0<\/td><td>0.5 &#8211; 1<\/td><td>1 &#8211; 2<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>High<\/strong><\/td><td><strong>3 &#8211; 5<\/strong><\/td><td>0 &#8211; 0.5<\/td><td>0.5 &#8211; 1<\/td><td>0.5 &#8211; 1<\/td><td>1 &#8211; 2<\/td><td>1 &#8211; 2<\/td><\/tr><\/tbody><\/table><\/figure>    <h3 class=\"wp-block-heading\" id=\"1-spring-fertilization-for-kentucky-bluegrass-march-may\">Spring Fertilization for Kentucky Bluegrass (March &#8211; May)<\/h3>    <h4 class=\"wp-block-heading\" id=\"2-low-maintenance-fertilizer-application\">Low Maintenance Fertilizer Application<\/h4>    <p>If you\u2019re aiming for a low-maintenance bluegrass lawn that\u2019s healthy but doesn\u2019t need to be the greenest on the block, here\u2019s the plan for you. This approach is not suitable for intense traffic or heavy use, and your lawn density might decline a bit. <strong>Apply a total of 1 to 3 pounds of nitrogen per 1,000 square feet each year.<\/strong><\/p>    <p>In spring, you can skip fertilizing if you want (autumn is, after all, the ideal time to fertilize Kentucky bluegrass). But if you skipped fertilization last autumn, spring is a good time to make up for it.&nbsp;<\/p>    <p>So, if you do decide to give your lawn a little fertilizer, apply <strong>0.5 pounds of nitrogen per 1,000 square feet in early spring<\/strong> (mid-March through April) and <strong>another 0.5 pounds in May<\/strong>. Make sure to space out your fertilizing sessions by six to eight weeks.<strong>&nbsp;<\/strong><\/p>    <h4 class=\"wp-block-heading\" id=\"3-moderate-maintenance-\">Moderate Maintenance&nbsp;<\/h4>    <p>If you\u2019re after a moderately-maintained lawn with a decent green color but can tolerate some seasonal changes, here\u2019s your game plan. This approach suits moderate traffic and use during non-drought periods. <strong>You\u2019re aiming to apply 2 to 4 pounds of nitrogen per 1,000 square feet each year.<\/strong><\/p>    <p>In early spring, you can either skip fertilizing or go for it. If you choose to fertilize, <strong>apply 0.75 pounds of nitrogen per 1,000 square feet between mid-March and April<\/strong>, followed by <strong>another application of<\/strong> <strong>0.5 to 0.75 pounds in May<\/strong>.&nbsp;<\/p>    <h4 class=\"wp-block-heading\" id=\"4-high-maintenance-\">High Maintenance&nbsp;<\/h4>    <p>For those of you who want the darkest green color and the densest turf that can handle intense traffic and heavy use, here\u2019s your high-maintenance strategy. <strong>You\u2019re aiming for 3 to 5 pounds of nitrogen per 1,000 square feet each year.<\/strong><\/p>    <p>You can choose to skip fertilizing in early spring, but if you want to get started, <strong>apply 0.5 pounds of nitrogen per 1,000 square feet between mid-March and April<\/strong>. Then, give it <strong>another boost with 0.5 to 1 pound of nitrogen in May<\/strong>. Don\u2019t forget to space out your fertilizing sessions by six to eight weeks.<\/p>    <h3 class=\"wp-block-heading\" id=\"5-summer-fertilization-for-kentucky-bluegrass-june-august\">Summer Fertilization for Kentucky Bluegrass (June &#8211; August)<\/h3>    <h4 class=\"wp-block-heading\" id=\"6-low-maintenance-\">Low Maintenance&nbsp;<\/h4>    <p>For those of you who prefer to keep lawn care simple and low-maintenance, summer is your time to relax. <strong>No need to fertilize your Kentucky bluegrass during these hot months<\/strong>. Kick back and let your lawn enjoy its summer break.<\/p>    <h4 class=\"wp-block-heading\" id=\"7-moderate-maintenance-\">Moderate Maintenance&nbsp;<\/h4>    <p>Moderate maintenance homeowners, you\u2019re in luck too! <strong>Summer means no fertilizing for you<\/strong> either. Your lawn can handle a little color change and will survive moderate traffic without the extra nutrients. So, take a break and enjoy the season: your lawn will be just fine.<\/p>    <h4 class=\"wp-block-heading\" id=\"8-high-maintenance-\">High Maintenance&nbsp;&nbsp;<\/h4>    <p><strong>Kentucky bluegrass does not need nitrogen in summer. <\/strong>However, for the high-maintenance lawn enthusiasts who want that deep green color and dense turf even in the heat, here\u2019s your summer game plan. <strong>Apply 0.5 to 1 pound of nitrogen per 1,000 square feet during the summer months.<\/strong><\/p>    <p><strong>Note: <\/strong>Applying nitrogen to Kentucky bluegrass (or any cool-season grass for that matter) in the summer increases the chance of pests and diseases. If you decide to follow this high-maintenance plan, you\u2019ll need to combine it with pest and disease interventions.&nbsp;<\/p>    <h3 class=\"wp-block-heading\" id=\"9-autumn-fertilization-for-kentucky-bluegrass-september-november\">Autumn Fertilization for Kentucky Bluegrass (September &#8211; November)<\/h3>    <h4 class=\"wp-block-heading\" id=\"10-low-maintenance-\">Low Maintenance&nbsp;<\/h4>    <p>As the crisp autumn air rolls in, it&#8217;s time to give your low-maintenance lawn a little boost. <strong>Apply 0.5 to 1 pound of nitrogen per 1,000 square feet in September.<\/strong> Then, treat your lawn to another application of <strong>1 pound of nitrogen per 1,000 square feet in either October or November<\/strong>.&nbsp;<\/p>    <p>Remember to space out these fertilizing sessions by six to eight weeks. Your lawn will be ready to weather the winter.<\/p>    <h4 class=\"wp-block-heading\" id=\"11-moderate-maintenance-\">Moderate maintenance&nbsp;<\/h4>    <p>For a moderately-maintained lawn that can handle a bit more traffic and still look good, autumn is your season to shine. Start with <strong>0.5 to 1 pound of nitrogen per 1,000 square feet in September.<\/strong> Follow it up with another dose of <strong>1 to 2 pounds of nitrogen per 1,000 square feet in October or November.&nbsp;<\/strong><\/p>    <h4 class=\"wp-block-heading\" id=\"12-high-maintenance-\">High maintenance&nbsp;&nbsp;<\/h4>    <p>High-maintenance lawn lovers, autumn is your time to go all out. Apply <strong>1 to 2 pounds of nitrogen per 1,000 square feet in September<\/strong>. Then, keep the momentum going with another <strong>1 to 2 pounds of nitrogen per 1,000 square feet in October or November<\/strong>.&nbsp;<\/p>    <p>Don&#8217;t forget to space out your fertilizing sessions by six to eight weeks. Your lawn will be the epitome of lush, green perfection, ready to handle anything from football games to fall picnics.<\/p>    <h2 class=\"wp-block-heading\" id=\"13-when-not-to-fertilize-kentucky-bluegrass\">When Not to Fertilize Kentucky Bluegrass<\/h2>    <p>Fertilizing your Kentucky bluegrass can work wonders, but there are definitely times when it\u2019s better to hold off. Here\u2019s when you shouldn&#8217;t fertilize your lawn:&nbsp;<\/p>    <ul class=\"wp-block-list\"> <li><strong>Excessive heat:<\/strong> Summer can be tough on grass, especially during a heatwave. Applying fertilizer during excessive heat can stress your lawn even more.&nbsp;<\/li> <\/ul>    <ul class=\"wp-block-list\"> <li><strong>Weed infestation:<\/strong> If your lawn is overrun with weeds, tackle those pesky invaders first. Fertilizing a weed-infested lawn is like sending an open invitation for more weeds to appear in your lawn. Once you&#8217;ve got the weeds under control, then you can think about fertilizing.<\/li> <\/ul>    <ul class=\"wp-block-list\"> <li><strong>After rain:<\/strong> Post-rainstorm fertilizing is a no-go. If you apply fertilizer right after a heavy rain, the nutrients are likely to wash away before your lawn has a chance to soak them up.&nbsp;<\/li> <\/ul>    <ul class=\"wp-block-list\"> <li><strong>During dormancy period:<\/strong> Don\u2019t fertilize during winter when your grass is dormant. It\u2019s taking a nap, and no matter how much you fertilize, it\u2019s just not going to absorb nutrients. Save your efforts for when your lawn is awake and ready to grow.<\/li> <\/ul>    <ul class=\"wp-block-list\"> <li><strong>Without soil test results:<\/strong> Always get a soil test first to understand what nutrients your lawn needs. This way, you\u2019re not wasting fertilizer or harming your grass.<\/li> <\/ul>    <h2 class=\"wp-block-heading\" id=\"14-faq-about-fertilizing-kentucky-bluegrass\">FAQ About Fertilizing Kentucky Bluegrass<\/h2>    <h3 class=\"wp-block-heading\" id=\"15-what-do-fertilizer-numbers-mean\">What do fertilizer numbers mean?<\/h3>    <p>The small numbers you see on each bag of fertilizer represent nitrogen, phosphorus, and potassium, in that order. These are called macronutrients, and they\u2019re the key nutrients that help plants grow. Check this guide on <a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/fertilizer-numbers-what-they-mean\/\">Fertilizer Numbers: Why They Matter and What They Mean<\/a>.<\/p>    <h3 class=\"wp-block-heading\" id=\"16-is-lime-good-for-kentucky-bluegrass\">Is lime good for Kentucky bluegrass?<\/h3>    <p>Lime is beneficial for your lawn if you need to correct its pH balance and bring soil acidity back to optimal levels. Cool-season grasses like Kentucky bluegrass thrive with pH levels between 6 and 6.8.<\/p>    <h3 class=\"wp-block-heading\" id=\"17-is-it-possible-to-burn-my-kentucky-bluegrass-with-fertilizers\">Is it possible to burn my Kentucky bluegrass with fertilizers?<\/h3>    <p>Fertilizers contain salts. When you apply an excess of fertilizer it can cause these salts to surround the root system, and hinder proper water absorption. When this happens, your grass loses health, vitality, and color, resulting in brown patches. This condition is known as fertilizer burn.<\/p>    <h2 class=\"wp-block-heading\" id=\"18-find-help-to-maintain-your-lawn\">Find Help to Maintain Your Lawn<\/h2>    <p>Applying fertilizer to your Kentucky bluegrass will yield fantastic results, making it green and vibrant. However, be prepared for more work as your grass grows thicker and faster, meaning you\u2019ll be spending more time mowing.&nbsp;<\/p>    <p>If the upkeep becomes overwhelming, contact a <a href=\"https:\/\/www.lawnstarter.com\/\">lawn care professional<\/a> who can help you maintain a beautiful lawn.<\/p>   <div class=\"wp-block-ub-content-toggle wp-block-ub-content-toggle-block\" id=\"ub-content-toggle-block-13f373cf-f38e-4377-9ae3-5cdb446c3dcd\" data-mobilecollapse=\"false\" data-desktopcollapse=\"true\" data-preventcollapse=\"false\" data-showonlyone=\"true\"> <div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f1f1f1; \" id=\"ub-content-toggle-panel-block-\"> \t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f1f1f1;\" aria-controls=\"ub-content-toggle-panel-0-13f373cf-f38e-4377-9ae3-5cdb446c3dcd\" tabindex=\"0\"> \t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-13f373cf-f38e-4377-9ae3-5cdb446c3dcd\" style=\"color: #000000; \"><strong>Sources<\/strong><\/p> \t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down\"><\/span><\/div> \t\t<\/div> \t\t\t<div role=\"region\" aria-expanded=\"false\" class=\"wp-block-ub-content-toggle-accordion-content-wrap ub-hide\" id=\"ub-content-toggle-panel-0-13f373cf-f38e-4377-9ae3-5cdb446c3dcd\">  <p><a href=\"https:\/\/extension.psu.edu\/kentucky-bluegrass\" target=\"_blank\" rel=\"noreferrer noopener\">PennState Extension<\/a><\/p>    <p><a href=\"https:\/\/www.rs.uky.edu\/consumer\/extension_pdfs\/agr206.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">University of Kentucky<\/a><\/p>    <p><a href=\"https:\/\/www.extension.purdue.edu\/extmedia\/ay\/ay-22-w.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">Purdue Extension<\/a><\/p>    <p><a href=\"https:\/\/extension.oregonstate.edu\/catalog\/pub\/ec-1278-fertilizing-lawns\" target=\"_blank\" rel=\"noreferrer noopener\">Oregon State University<\/a><\/p>    <p><a href=\"https:\/\/content.ces.ncsu.edu\/tall-fescue-and-kentucky-bluegrass-home-lawn-calendar\" target=\"_blank\" rel=\"noreferrer noopener\">NC State Extension<\/a><\/p>    <p><a href=\"https:\/\/bookstore.ksre.ksu.edu\/download\/kentucky-bluegrass-lawns_MF2262\" target=\"_blank\" rel=\"noreferrer noopener\">Kansas State University<\/a><\/p>  <\/div> \t\t<\/div> <\/div>   <p>Main Photo Credit: <a href=\"https:\/\/stock.adobe.com\/images\/manual-fertilizing-of-the-lawn-in-back-yard-in-spring-time-close-up\/221808951?asset_id=221808951\" target=\"_blank\" rel=\"noreferrer noopener\">maykal<\/a> \/ Adobe Stock<\/p>","protected":false},"excerpt":{"rendered":"<p>The best time to fertilize Kentucky bluegrass is in fall. Spring is the second-best time. How often you fertilize this grass will depend on your lawn goals. <\/p>\n","protected":false},"author":163,"featured_media":117157,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[28],"tags":[9],"class_list":["post-117163","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-lawn-care-2","tag-lawn-care"],"acf":[],"featured_image_src":"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/07\/Manual-fertilizer.jpg?wsr","author_info":{"display_name":"Cecilia Acevedo","author_link":"https:\/\/www.lawnstarter.com\/blog\/author\/cecilia-acevedo\/"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>When to Fertilize Kentucky Bluegrass<\/title>\n<meta name=\"description\" content=\"The best time to fertilize Kentucky bluegrass is in fall. Spring is the second-best time. How often you fertilize this grass will depend on your lawn goals.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/when-to-fertilize-kentucky-bluegrass\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"When to Fertilize Kentucky Bluegrass\" \/>\n<meta property=\"og:description\" content=\"The best time to fertilize Kentucky bluegrass is in fall. Spring is the second-best time. 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